Predator 3500 generator spark plug,

Predator 3500 Generator Spark Plug Recommendation for Optimal Operation

When it comes to the performance of a generator, spark plugs play an important role in ensuring reliable ignition and efficient combustion. 

The Predator 3500 generator is a popular choice among consumers, known for its durability and power output. 

To maintain the optimal performance of the Predator 3500 generator, you must use the right spark plug, and without the right spark plug, your generator will not fire as regarded

Hence, in this article, we will explore the importance of spark plugs, recommend the ideal spark plug for the Predator 3500 generator, provide installation instructions, and offer maintenance tips.

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Why are Spark Plugs Important for Predator 3500 Generator?

A spark plug is a small but vital component of an internal combustion engine, responsible for igniting the fuel-air mixture. 

It consists of several parts, including a metal shell, an insulator, a center electrode, a ground electrode, and a gap between them. 

When high voltage is supplied to the spark plug, a spark jumps across the gap, igniting the fuel mixture and starting the engine.

Selecting the correct spark plug for your generator is crucial. Factors such as heat range, thread size, reach, and electrode configuration should be taken into account. 

And choosing the wrong spark plug for your Predator 3500 generator can lead to inefficient combustion, poor fuel economy, reduced power output, and potential damage to the engine.

Therefore, to avoid all these side effects of having the wrong spark plug, you must get it right and choose a better spark plug for your generator. 

Also Check:- Generator Spark Plug Gap: What It Is and Why It Matters

Our Pick
Predator 3500 generator spark plug,

The NGK BPR6ES Spark Plug

The compatible spark plug is an NGK BPR6ES with a 0.028-0.031 inch gap. NGK is a reputable brand known for its reliable spark plugs that deliver consistent performance and durability.

To ensure the best performance and longevity of the Predator 3500 generator, it is recommended to use a high-quality spark plug specifically designed for this model. 

The compatible spark plug is an NGK BPR6ES with a 0.028-0.031 inch gap. NGK is a reputable brand known for its reliable spark plugs that deliver consistent performance and durability.

The NGK BPR6ES spark plug has a copper core that provides excellent heat dissipation and prevents overheating. 

It also features a triple-gasket sealing process to eliminate gas leakage and maintain proper combustion. 

By using this recommended spark plug, you can ensure the smooth and reliable operation of the Predator 3500 generator.

Do you know a Predator 4000 generator? Also Check:- What Type of Spark Plug for Predator 4000 Generator?

Predator 3500 Generator Spark Plug Location and Installation Process

Before you install the spark plug, you need to know where the spark plug is located. This has been a pressing issue for most Predator 3500 generator owners.

Hence, the spark plug of the Predator 3500 generator is located on the engine’s cylinder head, and the steps below will show you how to install or removed your old spark plug:

1. Ensure the generator is turned off and cooled down.

2. Locate the engine cover or housing of the generator.

3. Remove any screws or clips securing the engine cover to access the engine.

4. Once the engine is visible, locate the spark plug wire, which is typically a thick, insulated wire connected to the spark plug.

5. Gently pull the spark plug wire to disconnect it from the spark plug.

6. With a spark plug socket and ratchet wrench, loosen and remove the spark plug by turning it counterclockwise.

7. The spark plug will be attached to the end of the spark plug wire.

8. Inspect the spark plug for any signs of wear, fouling, or damage.

9. If necessary, clean or replace the spark plug before reinstalling it.

10. Apply a small amount of anti-seize compound to the threads of the spark plug.

11. Thread the spark plug back into the engine by hand, ensuring it is tightened securely but not over-tightened.

12. Use the spark plug socket and ratchet wrench to give the spark plug a final tightening, following the manufacturer’s recommended torque.

13. Reattach the spark plug wire onto the spark plug until it clicks into place.

14. Replace the engine cover or housing and secure it with the appropriate screws or clips.

However, if your generator is causing your spark plug to be black even if you install a new one, check out :- FAQs: Why Do New Spark Plugs Turn Black? (Answered)

Troubleshooting Predator 3500 Generator Spark Plug Issues

If you encounter issues with the spark plug in your Predator 3500 generator, several troubleshooting steps can help identify and resolve the problem. 

Common problems include misfires, weak sparks, and difficulty starting the engine. Here are a few tips to troubleshoot spark plug-related issues:

1. Check the spark plug wire for damage or corrosion and replace it if necessary.

3. Adjust the spark plug gap to the specified range if it is out of tolerance.

2. Ensure the spark plug is correctly installed and tightened to the recommended torque.

4. Clean the spark plug with a wire brush if it is fouled or covered in deposits.

5. If the spark plug continues to malfunction, consider replacing it with a new one.

Tips for Optimal Generator Performance

To maintain the best performance of your Predator 3500 generator, follow these additional tips:

1. Regularly change the generator’s oil and air filter according to the manufacturer’s recommendations.

2. Keep the generator clean and free from debris to prevent clogging and overheating.

3. Store the generator in a dry and secure location when not in use.

4. Use fresh fuel and stabilize it with a fuel stabilizer to prevent fuel degradation.

5. Follow the maintenance schedule outlined in the generator’s manual to ensure all components are inspected and serviced properly.


Choosing the right spark plug and properly maintaining it is crucial for the optimal performance of the Predator 3500 generator. 

By using the recommended NGK BPR6ES spark plug and following the installation and maintenance guidelines, you can ensure reliable ignition, efficient combustion, and prolonged engine life. 

Remember to inspect and replace spark plugs regularly to prevent potential issues and enjoy the full capabilities of your generator.

Frequently Asked Questions

1. How often should I replace the spark plug in my Predator 3500 generator?

It is recommended to inspect and replace the spark plug once a year or every 100 hours of operation, depending on which comes first.

2. Can I use a different spark plug brand for my Predator 3500 generator?

While it is possible to use a different brand, it is recommended to stick with the manufacturer’s recommendation, such as the NGK BPR6ES, for optimal performance.

3. What should I do if the spark plug keeps fouling?

If the spark plug keeps fouling, ensure you are using the correct fuel and oil mixture, check the air filter for clogs, and verify the spark plug gap is within the specified range.

4. Is it necessary to gap the spark plug before installation?

Yes, it is crucial to check and adjust the spark plug gap to the specified range before installing it in the Predator 3500 generator.

5. Can I clean and reuse a fouled spark plug?

While cleaning a fouled spark plug may improve its performance temporarily, it is generally recommended to replace it with a new one for optimal results.


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